Bicycle crank-hanger.



C. F. KLINE. BIGYGLB GRANK HANGER.

APPLICATION FILED NOY.'27, 1908.

920,583. Patented May 4, 1909.

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@Mme/oom 'UNTED STATESATENT QFFCE.

CLARENCE F. KLINE, OF KUTZTOWN, PENNSYLVANIA.

BICYCLE CRANK-HANGER.

Application filed November 27, 1908.

To all whom it may concern.' Y

Be it known that l, CLARENCE E. KLINE, a citizen of the United States, residing at liutztown, in the county of Berks and State of Pennsylvania, have iniv'ented certain new and useful Improvements in Bicycle Crank- Hangers, ot' which the following is a specification, reference being had to the accompanying' drawings.

This invention relates to improvements in bicycles and more particularly crank hangers therefor.

The object ol the invention is to provide a simple and practical device of this character composed or' lew parts which are strong and durable, and which may be produced at a small cost and readily assembled and adjusted.

TWith the above and other objects in view, the invention consists of the novel features olt construction and the combination and arrangement oi parts hereinafter fully described and claimed, and illustrated in the accompanying drandngs, in whichlligure 1 is vertical longitudinal sectional view through the invention; Fig. 2 is a vertical cross section on the line 2 2 in Fig. 1; Fig. 3 is a detail end view, and Fig. is an inner face view of one of the cranks.

ln the drawings 1, 1Ct denote the two cranks which are rigidly connected to each other through a shaft 2 formed integral with the crank 1 and arranged for rotation in a cylindrical bearing member or barrel 8 secured to the bicycle frame 4. The portion of the bicycle frame in which the bearing barrel cylinder 3 is removably secured is in the `form oi a split clamping sleeve or hanger, from the upper portion of Which radiate the several bars 5, 6, 7 of the usual diamondshaped bicycle vtrame. The bottom portion of the clamping sleeve or hanger 1 of the frame is split longitudinally and. the split portion is formed with pairs of opposing ears 8 apertured to receive clamping bolts or the like 9. lt will be seen upon reference to Fig. 2 that when the bolts 9 are tightened the hanger a will tightly bind the bearing barrel or cylinder 3 and rigidly unite the same to the bicycle frame.

The crank 1 has its inner end formed with a circular enlargement 10 containing on its inner face an annular cavity or recess 11 surrounding the integral shaft Said enlargement 10 also terms upon the inner face ot said end of the crank 1 an annular Vllange 12,

Specification of Letters Patent.

Ysaid crank.

Patented May 4, 1909.

Serial No. 164,701.

the exterior of which is reduced to provide an annular shoulder 13 against which fits the sprocket wheel 14. The latter is clamped on the shoulder 13 by a ring nut 15 engaged with screw threads 16 cut in the outer portion of the flange 12 and. said sprocket wheel is prevented from rotating With respect to the cr'ank 1 by the engagement of a stud 17 with an opening 18 in the outer portion of said sprocket wheel. Said stud 17 is formed integral with the crank 1 on its inner face and its projecting extremity is screw threaded to receive a clamping nut 19 which assists the nut l5 in securing the sprocket Wheel to The other crank 1 a is formed at its inner end with a similar circular enlargement 20, the inner face of which is formed vwith an annular cavity or recess 21 surrounding a central opening or bore 22 formed in said. enlargement 20. Said opening or bore 22 is hexagonal in cross section or of any other polygonal shape so th atV it has lat faces to receive the -Hat faced or similarshaped end 23 of the shaft 2 and thereby lock the crank 1 a to rotate with the shaft 2 and the crank 1. The crank 1iL is retained upon the shaft 2, preferably, by means of a screw 24 engaged with a threaded socket 25 formed centrally in the outer extremity of the shaft 2, as shown in Fig. l. Said screw 24a has a large circular head 26 adapted to lit in a similar-shaped recess 27 formed in the outer face oll the enlargement 20 of' the crank l, and the outer lace of said head 26 is formed at opposite points with seats 28 to receive the studs of a spanner Wrench by means ol which the screw 24 may be removed.

The bearing cylinder or barrel 3 has its eX- terior of uniform diameter so that when the bolts 9 of the hanger 4 are loosened it may be readily slipped into or out oi" said hanger, and its ends are shaped to provide annular race- Ways 29 i'or annular rows of bearing balls 30 provided in the cavities 11, 2l of the cranks 1, 1a. These bearings may be adjusted to compensate for wear and to obtain an effective working lit by adjusting a nut 32 upon external screw threads 33 Vi'ormed on the shaft 2 adjacent to its liat faced end 22, said nut 32 'forming an adjustable stop Which is engaged by the crank 1 when the latter is applied t-o the shaft 2 and which limits the inward movement of said crank on said shaft.

From the foregoing it will be seen that the invention provides an exceedingly simple device of this character which is composed of few strong and durable parte that may be produced at a small cost and readily assembled and adjusted. It ie not only comparatively inexpensive in conetruction but eX- ceedingly strong and durable in use and also attractive in appearance.

Having thus described the invention What is claimed is:

1. The combination of a bearing-barrel, a crank, a shaft carried b y said crank and projectingI through said barrel, said shaft havingI a iiati'aced extremity and a screw threaded portion, a nut upon the latter, a Second crank having an opening to receive Said hat faced extremity of the sha-ict, the inward mov enient of the second crank upon the shaft being` limited by said nut, anti-friction bearings between the shaft and its crank and said barrel, and means for retaining the second crank upon the shaft.

2. The combination of a split clamping hub of a bicycle frame, bolts for tightening said hub, a bearing barrel arranged in saidy hub andprovided at its ends With raceways, a crank recessed at one end to receive one end of the barrel7 an annular rouT of bearing balls in said recess and the raceWay at the adjacent end of the barrel, a shaft Aformed integral with said crank and having a flat faced extremity, a screw threaded portion and a screw threaded socket, a second crank having` an opening to receive the iiat faced eX- trernity of the shaftl andalso having annular recesavan annular row of bearing balls in the latter and the raceway at the adjacent end of thefbarrel, a nut upon the threaded portionof the shaft to limit the inward slid ing movement o? the second crank on the shaft, and headed screw for retaining,l the second crank upon the shaft and engaged 

